print("hello")

import numpy

x=[1,2,3,4,5]

x[0:3]
Out[32]: [1, 2, 3]

x[3:5]
Out[33]: [4, 5]

x[::-1]
Out[34]: [5, 4, 3, 2, 1]

x[4::-2]
Out[35]: [5, 3, 1]

x[::2]
Out[36]: [1, 3, 5]